Grease cup.



D. H. TWAITS.

GREASE CUP. APPLICATION FILED DEC. 29-1913- Patented' 001;. 2, 1917.

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irrm' UNITED Tamas AENT DANIEL H. TWAITS, OF CHICAGO, ILLINOIS.

FFICE- fl GREASE-CUP.

Specification of Letters Patent.

Patented Oct. 2, 191 '7.

Application filed December 29, 1913. Serial No. 809,147.

To all whom it may concern:

Be it known that I, DANIEL H. 'TFVAITS, a citizen of the United States, res1d1ng at Chicago, inthe county of Cook and State of Illinois, have invented a certain new and useful Improvement in Grease-Cups, of

which the following is a full, clear, and

exact description, reference being had to the accompanying drawings.

This invention is for grease cups of a type wherein there is a body portion and a cap secured to the body portion, a plunger within the cap and a screw device for moving the plunger to force the grease from the interior of the cup. The general object .of the invention is toprovide a durable grease cup which shall be efiicient in operation, simple in construction and have a neat appearance. More specific objects are to provide an efficient detentdevice for preventing the cup from becoming inadvertently displaced, to prevent the leakage of the grease, and to provide a plunger efficient in operation and of simple construction.

My invention is hereinafter more fully described in connection with the drawing, and the essential characteristics set forth in the claims.

Figure 1 is a SlrlQ elevation of my grease cup; Fig. 2 is a vertical central section of the cup and body, showing the plunger and a screw for reciprocating the same, in elevation; Fig. 3 is a plan of the grease. cup;

-Fig. 4: is an enlarged sectional detail of the through the nipple opens upwardly into the bottom of the bore 14:. The-cup member 16 is substantially cylindrical andclosed at its upperend, at 18, and the greater portion of its interior is cylindrically bored as at 20, to the same size as the bore 14:, and an enlarged portion of the bore 21 is internally threaded to fit the exterior threads of the portion '14:. A shoulder 22 is formed above the threaded bore 21, and the bore20 of the cup which fits the top of the portion 14, provldes a. smooth joint between the bores 14 and 20. 1

To prevent the cup becoming displaced after it is screwed into place, I provide on the lower edge of the cup, a series of notches 24:, adapted to cooperate with raised portions or humps25, in a circular spring 26.

This spring lies in the bottom of an annular V groove 27 made in the shoulder of the body portion, and is so arranged that the parts of the spring between the humps 25: normally bend upwardly, raising these humps into a spring engagement with the notches. The spring, however, is substantially flat when the cup is screwed into position, ex-

cept for the humps engaging the notches,

and in this position the beveled edges 28 v and 29 engage corresponding beveled surfacesat the sides of the annular grooves, 27,

making a very tightjoint at the lower edge of the cup, thereby preventing any grease which has leaked past the threads, coming to the exterior of the cup. The spring 26 is secured against rotation by meansof suitable rivet pins such as indicated at 30,.Figs. 5 and 6.

The plunger comprises an internally threaded sleeve 32 integral with an out wardly extending washer-like portion 33, which engages the lower side of a resilient member 35 of leather, felt or like material. This resilient member is held in place on the top side of the portion 33, by avwasherlike member 36 having a central opening embracing the sleeve 22, which is secured in position by an outwardly turned flange 38 formed on the sleeve 32. The greater portion of the periphery of this washer slidably fits the interior of the bore'20, and insures the periphery of the resilientmemher being in engagement with the bores.' At' the outer edge of thiswasherare provided spring portions or ears 37, made by bending up ears which project radially from the blank washer, when being formed, and at the same time cutting these portions back into the washer, as at 39,tc provide a greater length for the spring portion and thereby greater resiliency of these spring members. These press outwardly and engage the interior of the bore 20 as is shown inFig. l,

and prevent the plunger being rotated within the cap tically. v v Threaded into the sleeve 32, is a screw40 while allowing it to reciprocate ver- 45 1 prevents the periphery of the resilient having near its upper end a flange 41, en-

' gaging the under side of the closed end 18 tially cylindrical central portion {5 and two outwardly extendlng portions 4 6,-a nd at the 1 same time punching a} hole 417 through. the

of'the cup, and having ash'ank 42 extending through a suitable opening in this closed.- end. Mounted on the upper end of this" shank is a wing t providing a suitable grip 'for rotating the s'crew.. This wine; cap ispreferably made by pressing or stamping from a thick piece of 1netal, a blank of the shape shown in Fig.3, hav ngasubstan cylindrical portionffor rec'ei-vi'ng' the shank 423 This blank may be thus" very convenscrew 40," that" the plunger will be reciprocate'd'withinthe cup and if'm'ove'd downwc rdly "will force the grease out of the cup from the passage 15 onto the bearing surfaces. The spring members 87 engaging the 4 interior of the bore offer practically noresistance to :the vertical movement of the plunger, but at the same time prever'it'the plunger turning'when the screw is turned,

.by producing much greater friction at the periphery of the plunger than is caused at the central portion, by the turning of the screw."

a The bore let is preferably of such a depth j that wh'en. the plunger is in its down posi- 'thethreaded portion 21.

' tion,asshownrthe edge of the Washer 86 "will still be engaglng the bore 20, sdthat when the plungeris' moved clear down to forceout all the grease and the c'apis then removed for refilling, perhaps before drawing the plunger back into thecun, the plun- 1 gerfis preventedfrom moving laterally by thisengageme'nt of the washer, which thereinember becoming roughened or damaged on the'case if the plunger were free to move when in its down position, this movement being allowedby reason of the play at the .42. The lower end of thefscrew 4E0 'is's'pread by splitting it for a sh'ortdistanc'e,

. 1 fag; indicated at 50, whichprevents the 1plun- $51 61" becoming removedffro m the end of'the screw.

'A spiral Sp ite 52 having ag large end engaging the upper end of'the cup and its jsm'aller end surrounding a portion of the sleeve 32, as; at 53, mav be provided to make I it; easier toforce the grease fromthe-cup I and atthetsame time. to prevent rattling-or vibration of the parts. H V ..;:frictional engagement with the plunger. and f "65 This spring a also with the topfof the cap, whereby the This might be spring" serves the additionalpurpose of tendv mg to prevent the rotation of the plunger byreason'ofth'e engagement of the upper end. of the spring with the normally stationary cap. The cup 16 is provided at its upper end with a tubular knurled portion- 54 which facilitates screwing 'the' cuponto and removing. it from the base.

From the foregoing description, it will be seen that I have provided a detent-for the {cup which is not only etficient but which is entirely concealed, leaving a neat appearbe very cheaply manufactured.

ance onth'e outside of the cup. I-h'ave also provlded an efficient and slmple plunger; 1 and have provlded greasecup whlchimay I Having thus described mylnventlomwhat I claim is 1. In a grease cup, the combination of.

a base having a. male threaded portionaand ashoulder extending outwardly beneath the threads, a cap having internal threadseooperating wlth the male portion and having a notch in its lower edge, andfa detent'spri-ng carriedby said shoulder and engaging said notch. r 1 I w Ina greasecup, the combination of-a base having a male threaded portionan-d a should-er extending outwardly beneath the threaded portion, "a cap having internal f threads fitting the threads of thebase arid havingnotches in its lower edge, an annular groove 111 said shoulder, and a detent spring secured in the bottom of the groove,'

andlhavlng an upward projection engaging --the"not-ch 1n the cap. I

3. In a grease cup. the combination of-a engaging the notch in the capgsaid cap hav T ing its lower edges engagi g" the sides of the groove; 1 4. In a grease cup, the combination of a basehavin g a threaded nipple and anupwardly extending male, threaded portion and a shoulder extending" outwardly v neath said threaded portion; a c ap having basehaving a male threaded portion,- an out- 'wardly extending shoulder beneath said I fthreaded portion, a cap having'inter'nal threads fitting the threads of thebaseandhaving anotch in its'lower-edee; an annular groove in said shoulder, opening up :war'dly, and means in the annular 'gr'oo've internal threads fitting said threaded p'or- .'tion and having a seriesbf'notches inits, Q lower edge, andadetent spring .securedln the bottom of the groove havingupward projections adapted to engage said notches in the cap said groove havingflari'ng'sides,

flaring sidestwhen in position} 5. In-a greasecup, the combinationjwith a base having qan upwardly extending threaded portion and a shoulder extendin said cap having beveled edges engaging said,

outwardly at one end'of the threaded per- .tion, of a cap having threads fitting said" threaded portion and having a series of notch-es in its lower edge, a detent spring secured to said shoulder at the notched edge of the cap and having projections adapted to engage the notches in the cap, and an annular flange on said shoulder projecting toward the cap and adapted to tightly en gage the cap adjacent the notches.

6. In a grease cup, the combination of a base having an outwardly extending portion and an upwardly extending male threaded portion said male threaded portion being internally bored, and a cap having a bore and an enlarged threaded portion engaging the threads of the male portion so arranged that the two bores register when in position, a groove adjacent the bottom of said male threaded portion, a detent spring in said groove, and notches in the bottom of the cap engaging said detent spring said groove having its sides in engagement with the lower edge of the cap when in position.

7. In a grease cup, the combination of a. base, a cap threaded thereon, a plunger, a screw within the cap and extending outside the cap and a wing outside the cap for turning said screw to reciprocate the plunger said plunger comprisng a washer having an internally threaded sleeve engaging the screw, an intermediate resilient member engaging the interior of the cap, and a washer engaging the other side of the resilient member said last named washer surrounding said sleeve and being held in place by a flange upset from the sleeve, and means on said last mentioned washer for frictionally engaging the interior of the cap to prevent the plunger turning.

8. In a grease cup, the combination of a base, a cap threaded thereon, a plunger, a

screw within the cap and extending outside the cap, a wing outside the cap for turning said screw to reciprocate the plunger said plunger comprising a washer having an internally threaded sleeve engaging the screw, an intermediate resilient member engaging the interior of the cap, and a washer engaging the other'side of the resilient member said last named washer surrounding said sleeve and being held by a flange upset from the sleeve, and spring ears integral with said last named washer engaging the interior of the cap to prevent the plunger turning.

9. In a grease cup, the combination of a base, a cap threaded onto the base, a screw within said cap and a plunger adapted to be reciprocated by said screw comprising a washer having an upwardly turned internally threaded sleeve said washer being slightly smaller in diameter than the interior of the cup, a resilient member carried by said washer, and a second washer engaging said sleeve and the other side of said resilient member, a flange turned outwardly from said sleeve engaging said washer, and spring ears curled upwardly from said washer at its periphery and being cut back from the periphery of the washer to allow greater resiliency, said ears engaging the interior of the cap to prevent rotary movement of the plunger.

10. In a grease cup, the combination of a base and a cap, a plunger in the cap comprising a resilient member and a metallic member on either side of the resilient member one of said metallic members having spring portions integral with its outer edge in engagement with the interior of the cup.

11. In a grease cup, the combination of a base having a threaded nipple and an upwardly extended threaded portion, a shoulder extending outwardly below said threaded portion of the base and having a series of notches in its lower edge said shoulder having a groove, and a detent spring in said groove having an upward projection adapted to engage the notches in the cap, said cap being adapted to tightly engage the sides of said groove when in position.

In testimony whereof, I hereunto aifix my signature in the presence of two witnesses.

DANIEL H. TWAITS.'

Witnesses:

JUs'rIN W. MACKLIN, BRENNAN B. WEST.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents, Washington, D. 0. 

